Improvement in spikes for thrashing-machines



C. WILD'E.

SPI KES FQR THRASHING MACHINES.

Patented March 7,1876.

. WITNESSES:

monuivs.

N.PETERS, PHOTO-LITHQGRAPHER, WASHINGTON. D C

UNITED STATES- PATIENT QFFICE,

CHRISTOPHER WILDE, OF CANTON, OHIO.

0 IMPR'OVEMENT'IN SPIKES FOR THRASHlNG-MACHINES.

Specification forming part of Letters Patent No. 174,453, dated March 7,1876; application filed January 3, 1876.

improved spikes or teeth for thrashing-machines where they will besubject to great wear, which shall be so constructed as to wear muchlonger than when constructed in the ordinary way. The invention consistsin spikes for thrashing-machines, formed of malleable or wrought iron,faced with steel upon their forward edges and heads, as hereinafterfully described.

A represents a spike or tooth of a thrashing-machine. The body and shankof the spike A is made of malleable iron, and it is laced upon theforward edge, or upon the forward edge and head, with steel a. Thisleaves the shank soft, so that it may be readily fitted intothe hole inthe cylinder or concave, and may have the screw-thread readily out uponit, and in wear combine the advantages of the toughness of the iron andthe hardness of the steel.

The spike is formed by laying a piece of steel upon a piece of wroughtor malleable iron, and may be Welded, dropped, trimmed, and hardened atone heat. Spikes thus formed will be much stronger, and will last muchlonger, than when made without the steel fac- 1ng.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- I A spike for thrashing-machines, formed of malleableor wrought iron, faced with steel upon its forward edge and head, eitheror both, substantially as herein shown and described.

GHRISTOPHER WILDE.

